It was also thought maybe it's the spring, like, the end of it turning, or getting caught on the cage pin. I dunno. It's a mystery, but more important is how to fix it. I don't even have a Manix to mess with anymore though. According to others, it's happened with new out-of-the-box ones before but it's rare and much more common after disassembly/reassembly, which is why I assume there's a "proper" way to reassemble/fix it from Spyderco.
https://www.bladeforums.com/threads/the ... t-20001481 9/5/20 one guy here mentioned putting oil on the tang and it somehow fixed it
I tried everything to fix it. I took the thing apart and sanded down a ridge on the metal piece that houses the ball bearing and plastic cage. That didn't work. After that, I tried sanding off a ridge on the stem (little straight plastic piece) on the plastic cage because I thought that might be catching on the spring as I tried to close the knife. That didn't work.
After that, I looked all over online and saw some suggestions of opening the blade, very slightly loosening the screws that hold in the metal piece that holds the ball bearing and plastic cage, pressing the sharpened edge against something (safely, obviously), and then retightening the screws. That didn't work either.
I almost gave up. On a whim, I put a drop of oil on the tang of the blade (the area the ball bearing rides against) and on the ball bearing itself. I have no idea why, but that immediately fixed the clicking.
I don't know if it makes a difference, but the oil I used was CLP and the knife was an S110V model.
viewtopic.php?f=2&t=87140#p1436831 7/20/20 and Steve here gives his method which the above guy mentioned not working for him, nor did it work for me before
I have finally learned how to get rid of though. By loosening the four screws just above the cage-lock (Two screws on the left, two screws on the right). Then, with the blade open. I push the tip of the blade down onto a cutting board. Like I'm cutting something, with medium pressure. Then while that pressure is still being applied. I tighten all four screw back up. This pushes that metal ball-ramp/back-spacer back ever so slightly, and the clicking stops. :)